Quote:
Originally Posted by mole42uk
First results are mixed- the XP machine sees the drives as 3½” jobbies even after I’d altered the BIOS. The drives spin up okay but the machine asks me to insert a disk.
I brink I’ll now finish off the Fluxengine that I’ve bought because that is supposed to cope with any floppy hardware.
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Is that because PC's never really used 5.25" 720KB drives? - The most common types being:
5.25" 40T D/S - using Double-Density for 360KB
3.5" 80T D/S - using Double-Density for 720KB
5.25" 80T D/S - using Hi-Density for 1.2MB (+supports lower Double-Density 360KB 40T discs, with double-stepping)
3.5" 80T D/S - using Quad-Density for 1.44MB (+supports lower Double-Density 720KB discs, with extra notch)
(However, some later BIOS's may only support 1.44MB and 1.2MB drives)
Although there shouldn't really be much difference on the electrical interface between 5.25" and 3.5" drives, so if BIOS is set for 720KB then should still work with a 5.25" 80T Double-density drive (or Maybe even a Hi-Density 1.2MB 5.25" one, as it will also support lower Double-density 720KB and also 40T 360KB with double-stepping by computer).
But if these TB-504 drives weren't from a PC, then might have ensure drive-select is set to 1 and cable has twist to use for A: drive